Shanghai Daoqin Plastics Co., Ltd.

截止今 day, inner already to 刻不容缓 时刻, is anti 止疫情继续传染, 口罩现 in already formed is 人手必备 material product.

that 么口罩 is what can retardant 挡病毒 传播呢? it also is what 样 材质呢?

我们 usually 说口罩 is 无纺布材 material, 无纺布 is versus for textile 布 说, is non textile 布, is toward or machine fiber formed.

specific to upper, its raw materials full is polypropylene (PP) （Polypropylene, 简称PP）, medical use generally is more structure, generally is SMS structure , 示意图见图一 and 图二.

而我们经常说 几层口罩, in 口罩 国家 standards GB/T 32610 in has 规定, if is medical use 口罩, less is 3层, 即我们说 SMS（2层S层 and 1层M层）, currently inner most high is 5层, 即SMMMS（2层S层 and 3层M层）, 做口罩并不 difficult, comparison difficult is 做SMMMS布, Imported 无纺布 equipment price is upper 100 million yuan, 笔者见 most 贵 一台 medical 无纺布 equipment is 5 100 million 人民币.

this S table/sheet viscous 层（Spunbond）, its fiber comparison coarse, in 20 micron （μm） left right, 2层S纺 viscous main/primary function is 支撑整 无纺布 structure, for retardant 隔并没 has large function.

口罩里面 most important is retardant or 则熔喷层M（Meltblown）, 熔喷层 fiber comparison fine, in 2 micron （μm） left right, therefore has viscous 层直径 十 separation 之一, this for anti fine 菌, liquid its important function.

if S纺 viscous more, 口罩就 comparison hard, 而熔喷层M more, 则呼吸 comparison difficult, therefore from 口罩呼吸 difficult easy degree can 判断口罩 隔绝效果, 呼吸越困 difficult, retardant 隔效果 more good, is, if M层变 is film, basic upper can 呼吸, is retardant 隔, fast 不行, therefore, this is technology issues.

is more can issues, will viscous 层S fiber, 熔喷层M fiber and 头发做一 comparison lower,头发直径 1/3, 接近纺 viscous fiber, 而头发直径 1/30, and 熔喷层M fiber 直径接近, 当然, R&D also in development more fine fiber, ensure more good antimicrobial retardant property.

front to, M层越 fine, can retardant fine and other micro small pellets 进入, ratio 如N95, is in positive 常情况 lower, can retardant 挡95% micro small pellets （0.3 micron ）, according to medical grade anti 护口罩国家 standards GB/T 19083 requirements, in gas amount is 85L/min情况 lower, for non property pellets efficiency combined lower table/sheet requirements:

table/sheet 1: medical grade anti 护口罩 滤 and other grade

from upper understanding 释 说, N95实际 upper is use polypropylene (PP) 无纺布SMMMS made as formed can 滤95% micro fine pellets 5层口罩.

most rear from material degree separation for S纺 viscous and M熔喷层都 has which requirements:

M层: 熔喷层

材 material requirements: high flow property

recommendation material: Domestic material 如山东道恩 degradation method polypropylene (PP): Z-1400, Z1500, Imported LyondellBasell company metallocene polypropylene (PP) HP461Y, MF650Y.

S层: 纺 viscous 层

材 material requirements: high strength

recommendation material: melt in 25~60 polypropylene (PP), ratio ExxonMobil Exxon-Mobile and Shanghai 赛科 2040都 is very good viscous material, 如S2040 property can indicators lower: